Sides
Name
Isotiles
Sum
3
Triangle
1
180°
4
Quadrilateral
2
360°
5
Pentagon
3
540°
6
Hexagon
4
720°
7
Heptagon
5
900°
8
Octagon
6
1080°
9
Nonagon
7
1260°
10
Decagon
8
1440°
Sum = 180° × (n-2)
Where n = number of sides.